Properties of the Number 22666

Twenty-Two Thousand Six Hundred Sixty-Six

Basics

Value: 22665 → 22666 → 22667

Parity: even

Prime: No

Previous Prime: 22651

Next Prime: 22669

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 7 × 1619

Divisors: 1, 2, 7, 14, 1619, 3238, 11333, 22666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100010001010

Octal: 54212

Duodecimal: 1114A

Hexadecimal: 588a

Square: 513747556

Square Root: 150.55231648832242

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers n with digits 2 and 6 only. A284632

Numbers k such that 6^k - 7 is prime. A217352

E.g.f. satisfies A(x) = exp( x * (1+x/2) * A(x)² ). A365054

Decimal part of cube root of a(n) starts with 3: first term of runs. A34129

Numbers k such that 10^k + 8·R_k - 5 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A102944

Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7. A251889

Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 3 6 or 7. A252259

Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and the total absolute value of displacements not greater than n. A263935

Number of terms of A072873 less than or equal to 10ⁿ. A267757

Numbers k such that 7·10^k + 79 is prime. A282250